Division No. 4 is one of eighteen census divisions in the province of Saskatchewan, Canada, as defined by Statistics Canada. It is located in the southwest corner of the province, bordering Alberta to the west and Montana, United States to the south. The most populous community in this division is Maple Creek.
In the 2021 Census of Population conducted by Statistics Canada, Division No. 4 had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of , it had a population density of in 2021.
The following census subdivisions (municipalities or municipal equivalents) are located within Saskatchewan's Division No. 4.
Special service areas
Organized hamlets
Hamlets
Unincorporated communities